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Jens Axboe 316319e82f io_uring: add comments on why PF_EXITING checking is safe
We have two checks of task->flags & PF_EXITING left:

1) In io_req_task_submit(), which is called in task_work and hence always
   in the context of the original task. That means that
   req->task == current, and hence checking ->flags is totally fine.

2) In io_poll_rewait(), where we need to stop re-arming poll to prevent
   it interfering with cancelation. This is only run from task_work as
   well, and hence for this case too req->task == current.

Add a comment to both spots detailing that.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
2021-08-23 13:10:43 -06:00
arch powerpc fixes for 5.14 #6 2021-08-22 09:49:31 -07:00
block block-5.14-2021-08-20 2021-08-21 08:11:22 -07:00
certs
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Documentation RISC-V Fixes for 5.14-rc7 2021-08-21 11:04:26 -07:00
drivers Two clk driver fixes 2021-08-21 11:27:16 -07:00
fs io_uring: add comments on why PF_EXITING checking is safe 2021-08-23 13:10:43 -06:00
include io_uring: remove files pointer in cancellation functions 2021-08-23 13:10:37 -06:00
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kernel io_uring: remove files pointer in cancellation functions 2021-08-23 13:10:37 -06:00
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Makefile Linux 5.14-rc7 2021-08-22 14:24:56 -07:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.